GRE traffic issue with FTD

[Abheesh Kumar]

Hi All,

I'am facing an issue regrading GRE traffic in FTD 2110 firewall running 6.2.3.5.

Customer have a contractor team they are using AT&T remote access vpn service that uses GRE tunnel. 

I have created a tunnel rule in prefilter policy to fastpath the traffic and i can able to see the traffic as fastpathed in connection events, whenever the user tried to connect and when he enter his credentials it will try to connect and getting connection failed error. If he tried from other network like 4g or Home internet it works well. 

Any help to troubleshoot or did i need to configure any other things in FTD to allow GRE traffic

Regards,

Abheesh

[k.nandakumar]

What was the Action defined on the Pre-filter rule which you defined for this GRE traffic? is it allow or permit ? 

[Abheesh Kumar]

Hi Nanda,

I have already created a rule in prefilter for GRE traffic as fastpath. Still the remote access application is not working.

-Abheesh

[k.nandakumar]

What's the rule you had defined in the Prefilter for GRE. 

Can you get Show run access-list and show access-list from CLI ?

[Abheesh Kumar · Accepted solution]

Hi,

Issue resolved after adding the GRE traffic in normal pre-filter rule as fastpath not in tunnel rule.